Bread-knife.



B. R. BACON. BREAD KNIFE.

APPLICATION FILED AUG. H, I916.

Patented May 22, 1917.

Mm f m BYRON :a. BACON, or NORTH ennui, xrnw YORK, ASSIGNOBOF ONE-HALF r0 WILLIAMS.

BURDEN, OF ROCHESTER, NEW YQBK.

4 BREAD-KNIFE.

1,227,234. Specification of Letters Patent. Patented May 22 1917 To all whom it may concern:

Beit known that I, BYRON R. BACON, of North Chili, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Bread- Knives; and I do hereby declare the follow ing to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the referencenumerals marked thereon.

My present invention relates .to cutlery and-more particularly to carving knives or hand knives and it has for its object to provide an efficient and durable knife that will be cheap to manufacture and will possess certain'advantages over the ordinary form ofknife enabling it to cut more quickly and with less effort and more economically, the improvements being directed in part toward preventing waste of the material being cut, particularly bread and similar substances that have a tendency to produce crumbs. To these and other ends the invention resides in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claim at the end of the specification.

In the drawings:

Figure 1 is a side elevation of a knife constructed in accordance with and illustrating one embodiment of my invent on;

Fig. 2 is an enlarged fragmentary v1ew of a portion of the knife blade showing one of the cutting sections in greater deta l;

Fig. 3 is an edge view of the portion of the blade shown in Fig. 2;

Fig. 4 is a transverse fragmentary section on the line 4-4 of Fig. 2, and

Fig. 5 is a longitudinal section taken substantially on the line 55 of Fig. 2.

Similar reference numerals throughout the several figures indicate the same parts.

As'to its major element, the knife of my invention may comprise a handle 1 and a blade 2- as usual, 3 being the back of the blade and 4 the usual cutting edge. The however, not continuous but is interrupted by a series of parallel slots 5 extending at right angles therefrom 1n the preferred form into the body of the blade and being of uniform width. Otherwlse, the edge 4 is the normal knife edge taperedor ground from both sides so that-it lies in mediately Application filed Augustll, 1916. Serial No, 114,366.

the median plane of the'blade and can be sharpened on a stone. or steel in the customary-manner .by .abrading both sides equally;

The. slots 5 thus divide the blade into a: series of cutting sections 6 and the marginsor edges of the sections, otherthan the edge 4, defined by the walls of the slots are also made cuttingedges as indicated at 7. These edges are similarly tapered or ground from both sides so that they also he in themedian plane of the blade and hence in the same plane with the edge 4.

, In the process of manufacture, the normal blade with the edge 4 produced thereon is first run. into a slotting machine that forms the slots and then into a grinding machme hav ng a grinding wheel or tool of proper configuration to form a depression '8 in the regionof each slot on each'side of the blade, producing a continuous cutting edge 7 on each wall of the slot-extending throughout the length of .the latter. Of course, these depressions or cavities 8 may be groundindividually or in gangs and both sides of the knife may be ground simultaneously or first one side and then the other may be run against the grinding wheels. 1

The advantages of a knife constructed in accordance with my present invention are The points 9 formed by the junction of the cutting edges 7 and 4 are so disposed and proceed in such a direction with the natural cutting movement of the blade that they eat into the material being cut with great effect; The material crowded into the slots 5 by reason of the edge 4 sinking more rapidly into the substance is imand directly exposed to the cutting edges 7 so that a sharp edge is always proceeding directly against the material in'both a forward and a downward directionthe two directions in which a knife is naturally movedand,the actual effective cutting edge is really increased to the extent that it is almost doubled, for the sum of the edges 7 must be added to thesum of no abrupt shoulders or surfaces to come in contact with the walls of the out and produce crumbs as in the cutting of bread, due to particles of bread being scraped or be eradicated but as torn. Instead,there is presented only the inclined surfaces of the cutting edges 7 that slide over the Walls of the out With little ef-' feet, if any. Both the depressions '8 and the slots 5 permit a certain latitude in the in- Ward or pinching expansionofthe material being out against the natural Wedge .of the blade in its downward progress materially lessening the resistance to 7 its' passage through the material. 7 a

It is furthermore pointed out that the usual processes of honing or sharpening or setting the edge 4 do not'in any Way alter the original formationof the, knife, that is, the Wear on the edgedr does not affect the edges 7 otherwise than to shorten their lengths.- In other Words, the knife may be treated as an ordinary knife in sharpening and eventually the edges 7 and slots 5 might long as they exist at all they 'maintain their Copies of this patent may be obtained for five cents each, by addressing the a Washington, D. O.

efficiency in pro-. portion to their lengths.

The knife is adap ted'for ordinary kitchen or household use and Will be found most'ei fective incutting bread, cake, cold meats,

a series of cutting sections, the, transverse margins of wh ch are also tapered or ground 7 from both sides toform cuttmg edges'lylng in the same plane With the first named edge and in the median plane of the blade the taper of the cuttingjvsectionsbeinggradual and continuous fromthelr first named edges to their bases.

Witnesses: V RUSSELL B. GRIFFITH,

HARRIET FAY.

3 BYRON n. BACON:

Commissioner of iatents. 

